By wojiciech
Connected Tutorial(This question is a follow-up to this tutorial):
How to Set Up an IKEv2 VPN Server with StrongSwan on Ubuntu 20.04Hi. Please give me an example. In step 6 i don’t know how to implement sentence:
“Change each instance of eth0 in the above configuration to match the interface name you found with ip route”
It is not clear. I have gone through the entire tutorial and the connection is not working. This is a point I don’t know what it should look like.
regards W.
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Hi @wojiciech,
In the /etc/ufw/before.rules file, you’ll have NAT rules like that
*nat
-A POSTROUTING -s 10.10.10.0/24 -o eth0 -m policy --pol ipsec --dir out -j ACCEPT
-A POSTROUTING -s 10.10.10.0/24 -o eth0 -j MASQUERADE
COMMIT
*mangle
-A FORWARD --match policy --pol ipsec --dir in -s 10.10.10.0/24 -o eth0 -p tcp -m tcp --tcp-flags SYN,RST SYN -m tcpmss --mss 1361:1536 -j TCPMSS --set-mss 1360
COMMIT
See where on the first two lines after the IP address there is an eth0, You need to change that with your public interface. To see the public interface, type in
ip route show default
Your public interface should follow the word “dev”. For example:
default via your_server_ip dev eth1 proto static
In this case it’s eth1. So you need to change that in your /etc/ufw/before.rules file.
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